ISS036-E-017520 (9 July 2013) --- NASA astronaut Chris Cassidy, Expedition 36 flight engineer, is pictured in the Quest airlock of the International Space Station as he prepares for the start of a session of extravehicular activity (EVA) with European Space Agency astronaut Luca Parmitano (out of frame). Cassidy is wearing an Extravehicular Mobility Unit (EMU) spacesuit.